高固含量水性羟基聚丙烯酸酯的制备研究

Study on Preparation of High Solid Waterborne Hydroxyl Acrylic Resin

实验以甲基丙烯酸甲酯（MMA）、丙烯酸丁酯（BA）、苯乙烯（St）、丙烯酸（AA）、丙烯酸羟丙酯（HPA）、过氧化苯甲酰（BPO）、叔丁基过氧化物、链转移剂、二甲基乙醇胺（DMAE）、丙二醇甲醚（PM）、一缩二乙二醇丁醚为主要原料，溶液聚合法合成了含羟基水性聚丙烯酸酯树脂，将合成树脂固含量控制在80％～85％，水分散体固含量为45％，黏度小于1500mPa·s.讨论了引发剂、链转移剂、引发温度、玻璃化转变温度等因素对树脂合成及水分散体黏度的影响。研究结果表明：随着引发剂、链转移剂用量的增加，合成树脂及分散体黏度降低；随着引发温度的提高，合成树脂及水分散体黏度下降；玻璃化转变温度越高，合成树脂黏度越低。

The title waterborne hydroxyl acrylic polymer was prepared by solution polymerization using methyl methaerylate （ MMA）, butyl acrylate （ BA）, styrene （ St）, acrylic acid （ AA）, hydroxypropyl acrylate （HPA） , benzoyl peroxide （BPO） , tert - butyl peroxide, chain transfer, N, N - dimethyl ethanolamine （DMAE） , propylene glycol methyl ether（PM）, diethylene glycol monobutyl ether as main materials. The solid content of polymer resin was controled in the range of 80% -85% ,and the solid content of dispersion was 45% with Brookfield viscosity less than 1 500 mPa·s. The influence of initiator, chain transferor, kick of temperature and glass transition temperature on polymerization and viscosity of dispersion was disused. It was found that with the increase of initiator and chain transferor, the viscosity of resin and dispersion is decreased ; with the increase of kick of temperature, the viscosity of resin and dispersion is decreased ; with the glass transfer temperature increased, the viscosity of resin and dispersion also decreased.